chore: import upstream snapshot with attribution

apps/sim/app/(landing)/library/[slug]/loading.tsx

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+import { ContentPostLoading } from '@/app/(landing)/components'
+
+export default function LibraryPostLoading() {
+  return <ContentPostLoading />
+}

apps/sim/app/(landing)/library/[slug]/page.tsx

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+import type { Metadata } from 'next'
+import { getBaseUrl } from '@/lib/core/utils/urls'
+import { getAllPostMeta, getPostBySlug, getRelatedPosts } from '@/lib/library/registry'
+import { buildPostGraphJsonLd, buildPostMetadata, LIBRARY_SECTION } from '@/lib/library/seo'
+import { ContentPostPage } from '@/app/(landing)/components'
+
+export const dynamicParams = false
+
+export async function generateStaticParams() {
+  const posts = await getAllPostMeta()
+  return posts.map((p) => ({ slug: p.slug }))
+}
+
+export async function generateMetadata({
+  params,
+}: {
+  params: Promise<{ slug: string }>
+}): Promise<Metadata> {
+  const { slug } = await params
+  const post = await getPostBySlug(slug)
+  return buildPostMetadata(post)
+}
+
+export const revalidate = 86400
+
+export default async function Page({ params }: { params: Promise<{ slug: string }> }) {
+  const { slug } = await params
+  const post = await getPostBySlug(slug)
+  const related = await getRelatedPosts(slug, 3)
+
+  return (
+    <ContentPostPage
+      basePath={LIBRARY_SECTION.basePath}
+      backLabel='Back to Library'
+      post={post}
+      related={related}
+      graphJsonLd={buildPostGraphJsonLd(post)}
+      shareUrl={`${getBaseUrl()}${LIBRARY_SECTION.basePath}/${slug}`}
+    />
+  )
+}

apps/sim/app/(landing)/library/authors/[id]/loading.tsx

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+import { ContentAuthorLoading } from '@/app/(landing)/components'
+
+export default function AuthorLoading() {
+  return <ContentAuthorLoading />
+}

apps/sim/app/(landing)/library/authors/[id]/page.tsx

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+import type { Metadata } from 'next'
+import { getAllPostMeta } from '@/lib/library/registry'
+import { buildAuthorGraphJsonLd, buildAuthorMetadata, LIBRARY_SECTION } from '@/lib/library/seo'
+import { ContentAuthorPage } from '@/app/(landing)/components'
+
+export const revalidate = 3600
+
+export async function generateMetadata({
+  params,
+}: {
+  params: Promise<{ id: string }>
+}): Promise<Metadata> {
+  const { id } = await params
+  const posts = (await getAllPostMeta()).filter((p) => p.author.id === id)
+  return buildAuthorMetadata(id, posts[0]?.author)
+}
+
+export default async function AuthorPage({ params }: { params: Promise<{ id: string }> }) {
+  const { id } = await params
+  const posts = (await getAllPostMeta()).filter((p) => p.author.id === id)
+  const author = posts[0]?.author
+
+  return (
+    <ContentAuthorPage
+      basePath={LIBRARY_SECTION.basePath}
+      authorName={author?.name}
+      authorAvatarUrl={author?.avatarUrl}
+      posts={posts}
+      graphJsonLd={author ? buildAuthorGraphJsonLd(author) : undefined}
+    />
+  )
+}

apps/sim/app/(landing)/library/layout.tsx

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+import type { ReactNode } from 'react'
+
+/**
+ * Library route segment. The shared landing layout owns the chrome (navbar,
+ * footer, site-wide JSON-LD, scroll port); this layout only provides the
+ * `<main>` landmark for every library page. Library pages emit their own
+ * page-specific JSON-LD.
+ */
+export default function LibraryLayout({ children }: { children: ReactNode }) {
+  return <main id='main-content'>{children}</main>
+}

apps/sim/app/(landing)/library/loading.tsx

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+import { ContentIndexLoading } from '@/app/(landing)/components'
+
+export default function LibraryLoading() {
+  return <ContentIndexLoading />
+}

apps/sim/app/(landing)/library/page.tsx

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+import type { Metadata } from 'next'
+import { getAllPostMeta } from '@/lib/library/registry'
+import { buildCollectionPageJsonLd, buildIndexMetadata, LIBRARY_SECTION } from '@/lib/library/seo'
+import { ContentIndexPage } from '@/app/(landing)/components'
+
+/**
+ * Filtered/paginated variants render genuinely different lists, but only the
+ * bare index is indexable — see `buildIndexMetadata` in `@/lib/content/seo`
+ * for the shared noindex policy.
+ */
+export async function generateMetadata({
+  searchParams,
+}: {
+  searchParams: Promise<{ page?: string; tag?: string }>
+}): Promise<Metadata> {
+  const { page, tag } = await searchParams
+  const pageNum = Math.max(1, Number(page || 1))
+  return buildIndexMetadata({ tag, pageNum })
+}
+
+export default async function LibraryIndex({
+  searchParams,
+}: {
+  searchParams: Promise<{ page?: string; tag?: string }>
+}) {
+  const { page, tag } = await searchParams
+  const pageNum = Math.max(1, Number(page || 1))
+  const posts = await getAllPostMeta()
+
+  return (
+    <ContentIndexPage
+      basePath={LIBRARY_SECTION.basePath}
+      heading='The Sim Library'
+      subheading={LIBRARY_SECTION.description}
+      posts={posts}
+      page={pageNum}
+      tag={tag}
+      collectionJsonLd={buildCollectionPageJsonLd()}
+    />
+  )
+}

apps/sim/app/(landing)/library/rss.xml/route.ts

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+import { NextResponse } from 'next/server'
+import { latestModified } from '@/lib/content/utils'
+import { SITE_URL } from '@/lib/core/utils/urls'
+import { getAllPostMeta } from '@/lib/library/registry'
+import { LIBRARY_SECTION } from '@/lib/library/seo'
+
+export const revalidate = 3600
+
+export async function GET() {
+  const posts = await getAllPostMeta()
+  const items = posts.slice(0, 50)
+  const site = SITE_URL
+  const lastBuildDate = (latestModified(items) ?? new Date()).toUTCString()
+
+  const xml = `<?xml version="1.0" encoding="UTF-8" ?>
+<rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom">
+  <channel>
+    <title>Sim ${LIBRARY_SECTION.name}</title>
+    <link>${site}</link>
+    <description>${LIBRARY_SECTION.description}</description>
+    <language>en-us</language>
+    <lastBuildDate>${lastBuildDate}</lastBuildDate>
+    <atom:link href="${site}${LIBRARY_SECTION.basePath}/rss.xml" rel="self" type="application/rss+xml" />
+    ${items
+      .map(
+        (p) => `
+    <item>
+      <title><![CDATA[${p.title}]]></title>
+      <link>${p.canonical}</link>
+      <guid>${p.canonical}</guid>
+      <pubDate>${new Date(p.date).toUTCString()}</pubDate>
+      <description><![CDATA[${p.description}]]></description>
+      ${(p.authors || [p.author])
+        .map((a) => `<author><![CDATA[${a.name}${a.url ? ` (${a.url})` : ''}]]></author>`)
+        .join('\n')}
+      ${p.tags.map((t) => `<category><![CDATA[${t}]]></category>`).join('\n      ')}
+    </item>`
+      )
+      .join('')}
+  </channel>
+</rss>`
+
+  return new NextResponse(xml, {
+    headers: {
+      'Content-Type': 'application/xml; charset=utf-8',
+      'Cache-Control': 'public, s-maxage=3600, stale-while-revalidate=86400',
+    },
+  })
+}

apps/sim/app/(landing)/library/sitemap-images.xml/route.ts

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+import { NextResponse } from 'next/server'
+import { SITE_URL } from '@/lib/core/utils/urls'
+import { getAllPostMeta } from '@/lib/library/registry'
+
+export const revalidate = 3600
+
+export async function GET() {
+  const posts = await getAllPostMeta()
+  const base = SITE_URL
+  const xml = `<?xml version="1.0" encoding="UTF-8"?>
+<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9" xmlns:image="http://www.google.com/schemas/sitemap-image/1.1">
+${posts
+  .map(
+    (p) => `<url>
+  <loc>${p.canonical}</loc>
+  <image:image>
+    <image:loc>${p.ogImage.startsWith('http') ? p.ogImage : `${base}${p.ogImage}`}</image:loc>
+    <image:title><![CDATA[${p.title}]]></image:title>
+    <image:caption><![CDATA[${p.description}]]></image:caption>
+  </image:image>
+</url>`
+  )
+  .join('\n')}
+</urlset>`
+  return new NextResponse(xml, {
+    headers: {
+      'Content-Type': 'application/xml; charset=utf-8',
+      'Cache-Control': 'public, s-maxage=3600, stale-while-revalidate=86400',
+    },
+  })
+}

apps/sim/app/(landing)/library/tags/loading.tsx

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+import { ContentTagsLoading } from '@/app/(landing)/components'
+
+export default function TagsLoading() {
+  return <ContentTagsLoading />
+}

apps/sim/app/(landing)/library/tags/page.tsx

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+import type { Metadata } from 'next'
+import { getAllTags } from '@/lib/library/registry'
+import { buildTagsBreadcrumbJsonLd, buildTagsMetadata, LIBRARY_SECTION } from '@/lib/library/seo'
+import { ContentTagsPage } from '@/app/(landing)/components'
+
+export const metadata: Metadata = buildTagsMetadata()
+
+export default async function TagsIndex() {
+  const tags = await getAllTags()
+  return (
+    <ContentTagsPage
+      basePath={LIBRARY_SECTION.basePath}
+      tags={tags}
+      breadcrumbJsonLd={buildTagsBreadcrumbJsonLd()}
+    />
+  )
+}